<template>
    <div>
        <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 2.为Chart准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
    
    </div>
</template>
<script>
// 1.导入echarts
import *as echarts from 'echarts'
import _ from 'lodash'
export default {
    data(){
        return{
              options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      },
        }
    },
    created(){},
    // 此时页面上的元素，已经被渲染完毕
    async mounted(){
        // 3.基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const {data:res} = await this.$http.get(`reports/type/1`)
        if(res.meta.status !== 200){
            return this.$message.error('获取折线图数据失败！')
        }

        //4. 准备数据和配置项
        const result = _.merge(res.data,this.options)
        // 5. 使用刚指定的配置项和数据显示图表。
        myChart.setOption(result);
    },
    methods:{}
}
</script>

<style scoped>

</style>